Tight hip flexors can result in lower back pain, hip pain and injury. A lot of strain is put on those muscles during activities that involve sprinting and kicking. For example, runners are more prone to hip flexor injuries because of the small, repetitive movement during running. But even if you’re not an athlete, hip flexor injuries can occur during everyday activities (for instance, slipping and falling or running to catch a bus). When those tight muscles are suddenly stretched beyond what they are accustomed to, you might also experience pain in the upper groin region, typically where the hip meets the pelvis.
This stretch targets the adductors while opening the hips and lengthens the quad muscles, increasing strength and flexibility in the upper legs and hips. Begin by kneeling upright. Straighten your right leg out behind you, keeping your knee on the floor. Place your fingertips on the floor on either side of your knees and push your hips lower toward the floor, so your groin approaches your left foot. Hold this pose for 30 seconds before repeating on the opposite side.

Of course, you know what it feels like to have a tight muscle. But tight hips aren't just uncomfortable—they can lead to all sorts of other aches and pains, especially in the lower back. "People focus on the hips and say their hips are tight, but we don't always think about the fact that the lower back connects to our legs at the hip," Charlee Atkins, C.S.C.S., instructor at Soul Annex in New York City and creator of Le Stretch class, tells SELF. Tight hip flexors make it harder for your pelvis to rotate properly, which can cause your lower back to overcompensate, "and this can be a setup for lower-back injury," Teo Mendez, M.D., an orthopedic surgeon at NY Orthopedics who focuses on operative and non-operative management of sports-related injuries, musculoskeletal injuries, and arthritis, tells SELF.